PHP Core Warning – yii\base\ErrorException

$_GET = [
    'redirect_url' => '/yjds2016/cases/match',
];

$_COOKIE = [
    'topics-session' => '1791266203.124.16517.601013|d197bbbd1d400bd72372bc93068ad169',
    'PHPSESSID' => '227prookusrr9q5dcqsk3go473',
    '_csrf' => 'e4d6b7e8bed0a6e7ad7c42f192d685bdb71487af6525ce6072576b45f8c1f4d0a:2:{i:0;s:5:"_csrf";i:1;s:32:"y1_PME8fdEdzUffueAalForFXe8KO76a";}',
];